feat: Add the ability to un-assign teams using automation (#9668)

Co-authored-by: Pranav <pranavrajs@gmail.com>

spec/services/action_service_spec.rb

@@ -31,18 +31,54 @@ describe ActionService do
 
   describe '#assign_agent' do
     let(:agent) { create(:user, account: account, role: :agent) }
-    let(:conversation) { create(:conversation, account: account) }
     let(:inbox_member) { create(:inbox_member, inbox: conversation.inbox, user: agent) }
+    let(:conversation) { create(:conversation, :with_assignee, account: account) }
     let(:action_service) { described_class.new(conversation) }
 
     it 'unassigns the conversation if agent id is nil' do
       action_service.assign_agent(['nil'])
       expect(conversation.reload.assignee).to be_nil
     end
+  end
 
-    it 'unassigns the team if team_id is nil' do
-      action_service.assign_team([nil])
-      expect(conversation.reload.team).to be_nil
+  describe '#assign_team' do
+    let(:agent) { create(:user, account: account, role: :agent) }
+    let(:inbox_member) { create(:inbox_member, inbox: conversation.inbox, user: agent) }
+    let(:team) { create(:team, name: 'ConversationTeam', account: account) }
+    let(:conversation) { create(:conversation, :with_team, account: account) }
+    let(:action_service) { described_class.new(conversation) }
+
+    context 'when team_id is not present' do
+      it 'unassign the if team_id is "nil"' do
+        expect do
+          action_service.assign_team(['nil'])
+        end.not_to raise_error
+        expect(conversation.reload.team).to be_nil
+      end
+
+      it 'unassign the if team_id is 0' do
+        expect do
+          action_service.assign_team([0])
+        end.not_to raise_error
+        expect(conversation.reload.team).to be_nil
+      end
+    end
+
+    context 'when team_id is present' do
+      it 'assign the team if the team is part of the account' do
+        original_team = conversation.team
+        expect do
+          action_service.assign_team([team.id])
+        end.to change { conversation.reload.team }.from(original_team)
+      end
+
+      it 'does not assign the team if the team is part of the account' do
+        original_team = conversation.team
+        invalid_team_id = 999_999_999
+        expect do
+          action_service.assign_team([invalid_team_id])
+        end.not_to change { conversation.reload.team }.from(original_team)
+      end
     end
   end
 end